Home / 13,120.75-18,107.72-7,532.83

Finding the Fourth Proportional to 13,120.75, 18,107.72 and 7,532.83

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Solution

The fourth proportional to 13,120.75, 18,107.72 and 7,532.83 is: 10,395.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.75 : 18,107.72 = 7,532.83 : x
  2. Step 2: Convert to fraction form
    13,120.75/18,107.72 = 7,532.83/x
  3. Step 3: Cross multiply
    13,120.75x = 18,107.72 × 7,532.83
  4. Step 4: Simplify right side
    13,120.75x = 136,402,376.45
  5. Step 5: Solve for x
    x = 136,402,376.45/13,120.75
  6. Step 6: Final answer
    x = 10,395.93

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Half scale
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Double scale
Find fourth proportional to 13,121.75, 18,109.10 and 7,533.83
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.